package com.itheima.service;

import com.itheima.pojo.Member;

import java.util.ArrayList;
import java.util.List;

public interface MemberService {
    //判断
    public Member findByTelephone(String telephone);

    //添加成员
    public void add(Member member);

    //根据月份查询前十二个月每个月的会员注册数量
    public List<Integer> findMemberCountByMonths(ArrayList<String> months);
}
